CN115748812A - Prefabricated PC template of basis - Google Patents
Prefabricated PC template of basis Download PDFInfo
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- CN115748812A CN115748812A CN202211410936.2A CN202211410936A CN115748812A CN 115748812 A CN115748812 A CN 115748812A CN 202211410936 A CN202211410936 A CN 202211410936A CN 115748812 A CN115748812 A CN 115748812A
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Abstract
The invention discloses a foundation prefabricated PC template, which relates to the technical field of building foundation pit modeling, and comprises a prefabricated concrete slab and a prefabricated concrete base, wherein reinforcing steel bars are embedded in the prefabricated concrete slab; the precast concrete slab is of a square structure, the upper, lower, left and right sides of the precast concrete slab are integrally processed with frames, the frames are protruded out of the back of the precast concrete slab and enclose a soil filling groove, the top surface of the upper frame is provided with a board mortise with a through groove structure, the bottom surface of the lower frame is provided with a tenon, and two ends of the bottom of the board mortise are provided with triangular grooves with downward sharp corners; a base mortise is arranged on the top edge of the precast concrete base; for one precast concrete plate, the tenon can be matched and inserted into the base mortise to form a rabbet structure, or matched and inserted into the board mortises of other precast concrete plates to form a rabbet structure. The invention adopts prefabricated production, is convenient for construction, saves labor, time and materials, and is not easy to crack or collapse in the process of backfilling earthwork on the back surface of the plate.
Description
Technical Field
The invention relates to the technical field of building foundation pit modeling, in particular to a foundation prefabricated PC template.
Background
At present, in building foundation pit molding, basement raft, cushion cap etc. all adopt traditional brick fetal membrane to model, rely on building mortar to bond shale brick building block into a whole promptly, form certain slope and rely on the dead weight to prop up the fender to the back earthwork to form the stereoplasm surface as waterproof layer basic unit, construction cycle is long, and artifical input is big, and material cost is high, has more and more unsatisfied the construction needs on building site.
Disclosure of Invention
The present invention is to provide a foundation prefabricated PC template that can alleviate the above-mentioned problems.
In order to alleviate the above problems, the technical scheme adopted by the invention is as follows:
the invention provides a foundation precast PC template for foundation pit modeling, which comprises a precast concrete plate and a precast concrete base, wherein reinforcing steel bars are embedded in the precast concrete plate;
the precast concrete slab is of a square structure, the upper, lower, left and right sides of the precast concrete slab are integrally processed with frames, the frames are protruded on the back of the precast concrete slab and enclose a soil filling groove, the top surface of the frame at the upper part is provided with a board mortise of a through groove structure, the bottom surface of the frame at the lower part is provided with a tenon, and two ends of the bottom of the board mortise are provided with triangular grooves with downward sharp corners;
the top edge of the precast concrete base is provided with a base mortise;
for a certain precast concrete plate, the tenon can be inserted into the base mortise in a matching manner to form a rabbet structure, or other plate tenons of the precast concrete plate are inserted in a matching manner to form the rabbet structure, and triangular splicing reinforcing holes with downward tips are arranged at two ends of the rabbet structure and are formed by the bottom surface of the tenon and the triangular groove above the triangular splicing reinforcing holes.
In a preferred embodiment of the present invention, the thickness of the precast concrete slab is 5cm, so that the precast concrete slab does not cause excessive waste of quality under the condition of achieving stability and smoothness.
In a preferred embodiment of the invention, the precast concrete slab comprises a reinforcing steel bar box and a steel wire mesh positioned in the reinforcing steel bar box, the reinforcing steel bar box is surrounded by phi 6 reinforcing steel bars arranged along the length direction of the frame, and the steel wire mesh is formed by interweaving phi 1.2 steel wires.
In a preferred embodiment of the invention, glass fibre filaments are incorporated in both the precast concrete panel and the precast concrete base.
Compared with the prior art, the invention has the beneficial effects that:
1) The prefabricated slab is prefabricated and convenient to construct, even if the prefabricated slab fetal membrane assembly is manufactured according to a basic drawing before excavation, the prefabricated slab fetal membrane assembly can be cut and used by using plates with standard specifications, the prefabricated slab is convenient to bond, and the operation is simple;
2) Labor, time and materials are saved: the prefabricated slab tire membrane can be lighter and thinner after being matched with the steel bars, the material and labor amount are saved compared with the masonry brick tire membrane, the waterproof layer can be directly constructed on the surface of the prefabricated slab without plastering due to smooth surface, and the labor, the material and the time of the plastering process are saved;
3) The quality is ensured: the prefabricated plate base film has the strength far higher than that of the brick base film, and the plates can use adhesive and are not easy to crack or collapse in the process of backfilling earthwork on the back surface of the plate;
4) The frame protrudes towards the soil filling surface, namely protrudes from the back of the precast concrete slab, the formed soil filling groove can be filled with soil, the top of the frame after the soil filling is subjected to vertical gravity load of soil, the good effect on the overall stability of the prefabricated slab matrix is achieved, and the principle of the prefabricated slab matrix is the same as that of a wing plate of a concrete retaining wall band;
5) The connecting surface of the frame is wider than the thickness of the prefabricated plate (the thickness adopted by the invention is 5 cm), so that the adhesive has a larger contact surface and larger adhesive force, the strength of the whole tire membrane is improved, and the prefabricated plate is not easy to deform and break;
6) The thickness of the section of the plate is increased at the frame, so that the plate is not easy to crack integrally due to collision in transportation;
7) The tongue-and-groove structure is designed, so that part of lateral force rigidity of the soil body can be provided, and then, cementing materials can be saved during splicing.
8) The tank bottom both ends of board tongue-and-groove are provided with the triangular groove that the closed angle is down, and two precast concrete boards are spliced the back up, can form triangle concatenation reinforced hole, then can be through on the horizontal direction, insert a twisted steel bar in two adjacent triangle concatenation reinforced hole, ensure the concatenation stability between the precast concrete board.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a first exploded view of a basic prefabricated PC form according to the present invention;
FIG. 2 is a second exploded view of the basic prefabricated PC form of the present invention;
FIG. 3 is an assembly view of the basic prefabricated PC formwork of the present invention;
fig. 4 is a cross-sectional structural view of a precast concrete panel according to the present invention;
fig. 5 is a schematic top view of a precast concrete panel according to the present invention;
FIG. 6 is a schematic diagram of the application of the basic prefabricated PC template of the present invention;
in the figure: 1-precast concrete base, 2-base mortises, 3-precast concrete slabs, 4-slab mortises, 5-tenons, 6-earth filling grooves, 7-frames, 8-reinforcing steel bar frames, 9-steel wire meshes and 10-triangular grooves.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to fig. 1 to 5, the invention discloses a foundation precast PC template for foundation pit modeling, which comprises a precast concrete slab 3 and a precast concrete base 1, wherein reinforcing steel bars are embedded in the precast concrete slab.
The precast concrete base 1 is provided with a base mortise 2 on the top edge, as shown in fig. 1 and 2.
For a certain precast concrete plate 3, the tenon 5 can be matched and inserted into the base mortise 2 to form a rabbet structure, as shown in figure 3, or matched and inserted into the board mortise 4 of other precast concrete plates 3 to form a rabbet structure, and triangular splicing reinforcing holes with downward tips are arranged at both ends of the rabbet structure. As shown in fig. 6, the bottom of the prefabricated concrete base 1 is the prefabricated concrete base, and the other parts are formed by assembling the prefabricated concrete plates 3 through a rabbet structure (60 ° assembly indicates that the prefabricated concrete base is inclined outwards, and in addition, the prefabricated concrete base can be assembled at 90 °), the formed triangular splicing reinforcing holes are hidden therein, the triangular splicing reinforcing holes are composed of the bottom surfaces of the tenons 5 and the triangular grooves 10, and when the prefabricated concrete base is assembled, the threaded steel bars with the diameter of 14 ° are inserted into the triangular splicing reinforcing holes, namely for the two triangular splicing reinforcing holes butted in the horizontal direction, two half sections of the threaded steel bars are respectively inserted into the triangular splicing reinforcing holes, namely, the adjacent prefabricated plate groups are connected by the threaded steel bars, and due to the triangular structure with the pointed ends facing downwards, the threaded steel bars can be firmly clamped under the self-gravity, the splicing stability between the prefabricated concrete plates is ensured, and the spliced plate surfaces formed after the prefabricated concrete plates are spliced are ensured to be straight. The precast concrete plates 3 are contacted through the frame 7, and the contact surface of the frame 7 is provided with adhesives, so that the splicing firmness is increased.
Volume weight of reinforced concrete precast slab (24 KN/m) 3 ) Larger than brick wall (16 KN/m) 3 ) The strength of the plate is greatly higher than that of a brick wall, so that the thickness of the prefabricated plate does not need to be the same as that of the brick wall, the requirement of stability and smoothness can be met, and waste of excessive quality is avoided.
Therefore, in the present invention, the thickness of the precast concrete panel 3 is designed to be 5cm. The precast concrete slab 3 comprises a reinforcing steel bar frame 8 and a steel wire mesh 9 arranged in the reinforcing steel bar frame 8, wherein the reinforcing steel bar frame 8 is formed by surrounding phi 6 reinforcing steel bars arranged along the length direction of a frame 7, and the steel wire mesh 9 is formed by interweaving phi 1.2 steel wires, as shown in figure 4. According to multiple test practices, the reinforced concrete slab with the thickness of 5cm can meet the use requirement.
The prefabricated plate has high hardness, but has the advantages of small thickness of 5cm, insufficient flexibility, easy breakage and small loss in the transportation and installation processes. Therefore, the glass fiber is mixed in the precast concrete plate 3 and the precast concrete base 1, and the glass fiber has high tensile strength and high elongation rate, so that the bending resistance and the impact resistance of the concrete sheet can be improved, and the concrete sheet is prevented from being broken.
The foundation prefabricated PC template is suitable for position modeling formworks such as basement raft boards, bearing platforms and the like,
when the foundation precast PC template is applied to foundation pit modeling, the surface of a foundation cushion layer needs to be cleaned, a corner is installed firstly, namely, the precast concrete base 1 is installed firstly, a base mortise is utilized to perform a base horizontal positioning groove, and then the next process is performed, so that the foundation control elevation is stabilized. And after the precast concrete base 1 is installed, installing the precast concrete plate 3 on the precast concrete base. The height of a foundation pit bearing platform is less than 600mm, and a precast concrete plate 3 (a bearing platform side mold) is manufactured and molded at one time; when the height of the bearing platform is larger than or equal to 600mm, a plurality of precast concrete plates 3 are assembled, the precast concrete plates are connected by using an adhesive while being installed, and a threaded steel bar with the diameter of 14 is inserted into the triangular splicing reinforcing hole in the splicing process, wherein the figure 6 is an example of the assembled form.
And after the foundation pit is shaped for 1 day, backfilling earthwork on the back surface. During backfilling, a method of thin filling, slow speed and multiple times is adopted, manual backfilling is adopted, the thickness of a filled earth is not more than 250mm at one time, wherein a part of backfilling soil is filled into a soil filling groove 6 on the back of the precast concrete plate 3, so that the precast concrete plate 3 is tightly combined with the backfilling soil; and (4) performing protection work on the precast concrete plate 3 in the backfilling earthwork layering ramming process to prevent the precast concrete plate 3 from being damaged.
In the present invention, the precast concrete panel 3 is used with a thickness of 5cm, and its side length specification may be 300 × 1200/400 × 1200/500 × 1200/600 × 1200, unit, mm.
When the foundation prefabricated PC template is installed, a tower crane or a truck crane is frequently adopted as a hoisting machine, and machines and tools comprise steel beams, a lifting grab, a shackle, a safety hook, a lifting rope and the like.
The foundation prefabricated PC template can be cut and spliced, can be used in places with high construction difficulty, can accelerate the production progress, has smooth surface, can be directly used as a waterproof layer without plastering treatment, and saves the time required by plastering and airing. The prefabricated PC template of basis has produced fabulous benefit after being used for foundation ditch molding, specifically as follows:
1. benefits of construction period
When the foundation pit is modeled by adopting the foundation prefabricated PC template, the time consumption is 0.5 day for earthwork excavation, and the foundation prefabricated PC template is synchronously backfilled for 0.5 day after earthwork installation, which is 1 day totally (the prefabricated plates are prepared in advance without the key process and time consumption for preparation and transportation). The time consumed by the traditional technology is as follows: excavating earthwork for 0.5 day, building brick moulding bed for 1 day, backfilling the earthwork at the back side for 0.5 day, plastering the inclined plane for 0.2 day, and developing the plastering strength to be capable of constructing a waterproof layer for 0.8 day, which is 3 days in total.
Therefore, the foundation pit is modeled by the foundation prefabricated PC template, the construction period saving ratio is 2/3 compared with the traditional method (brick moulding bed method), the total construction period needs 30 days continuously, and the saving construction period is 20 days.
2. Resource efficiency of artificial machinery
The construction foundation pit modeling of a certain engineering only needs 5 prefabricated PC templates, and if the brick moulding bed is made, 25 prefabricated PC templates are needed, so that 20 workers are saved, the production activities of other procedures can be input, the aging problem is solved, the installation is simple, professional technical workers are not needed, and common workers can be used for men and women.
The method has the advantages that the tower crane is only needed to be used for 1 hour every day when the basic prefabricated PC template is made, all-weather hoisting of bricks and cement mortar is needed when the brick moulding bed is made, about 50 hoisting times/day/tower crane are saved, the total construction period is continuously 30 days, and the hoisting times of the tower crane are saved by 1500 times.
The prefabricated PC template of installation basis need not join in marriage other machines alone on the project and transports.
3. Environmental protection benefit
The prefabricated slab is prepared in an energy-saving and industrialized manner, the efficiency can be improved, the energy consumption is saved, and meanwhile, the energy for transporting a large number of building blocks and masonry mortar by a tower crane is saved.
Land saving-the shale brick that saves can reduce the consumption of raw and other materials soil.
The material-saving and water-saving industrialized foundation prefabricated PC template fully utilizes cement board waste and construction abandoned short battens, and enables the construction waste to be reused. The precast slab moulding bed has smooth surface and does not need plastering treatment.
The environmental protection-quick construction period means that the sealing of bare soil is accelerated, the flying dust is reduced, the masonry and plastering mortar are saved, the transportation of a tank car is reduced, the treatment link of waste mortar is also reduced, and meanwhile, the industrial basic prefabricated PC template can uniformly treat waste water and waste gas.
4. Social benefits
The foundation prefabricated PC template is applied to foundation pit modeling, so that the construction quality is improved, the construction period is shortened, and the foundation prefabricated PC template has environmental protection significance in all aspects.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A foundation precast PC template is characterized by comprising a precast concrete plate (3) and a precast concrete base (1), wherein reinforcing steel bars are embedded in the precast concrete plate;
the precast concrete slab (3) is of a square structure, frames (7) are integrally processed on the upper, lower, left and right sides of the precast concrete slab (3), the frames (7) are convexly displayed on the back of the precast concrete slab (3) and enclose a soil filling groove (6), a slab mortise (4) with a through groove structure is arranged on the top surface of the upper frame (7), a tenon (5) is arranged on the bottom surface of the lower frame (7), and triangular grooves (10) with downward sharp corners are arranged at two ends of the bottom of the slab mortise (4);
the top edge of the precast concrete base (1) is provided with a base mortise (2);
for one precast concrete plate (3), the tenon (5) can be matched and inserted into the base mortise (2) to form a rabbet structure, or matched and inserted into the board mortises (4) of other precast concrete plates (3) to form the rabbet structure, and triangular splicing reinforcing holes are formed at two ends of the rabbet structure.
2. The basic precast PC template according to claim 1, wherein the precast concrete plate (3) has a thickness of 5cm.
3. The prefabricated PC formwork of the foundation as claimed in claim 1, wherein the precast concrete slab (3) includes a reinforcing steel bar frame (8) therein, and a steel wire mesh (9) in the reinforcing steel bar frame (8), the reinforcing steel bar frame (8) is surrounded by phi 6 reinforcing steel bars arranged along the length direction of the frame (7), and the steel wire mesh (9) is formed by interweaving phi 1.2 steel wires.
4. The basic precast PC template according to claim 1 or 3, characterized in that glass fiber filaments are incorporated in both the precast concrete panel (3) and the precast concrete base (1).
5. Use of the prefabricated PC template of any one of claims 1 to 4 for foundation pit construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410936.2A CN115748812A (en) | 2022-11-11 | 2022-11-11 | Prefabricated PC template of basis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211410936.2A CN115748812A (en) | 2022-11-11 | 2022-11-11 | Prefabricated PC template of basis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115748812A true CN115748812A (en) | 2023-03-07 |
Family
ID=85369452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211410936.2A Pending CN115748812A (en) | 2022-11-11 | 2022-11-11 | Prefabricated PC template of basis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115748812A (en) |
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2022
- 2022-11-11 CN CN202211410936.2A patent/CN115748812A/en active Pending
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